Driverless Mercedes Debuts at Frankfurt International Car Show

Daimler has unveiled its much anticipated self-driving Mercedes Benz at the Frankfurt International car show. The auto maker has been making incremental improvements to its autonomous technology, saying the car, driving with limited autonomy, performed well on a recent 100 km test drive through Germany. Daimler plans to have a fully autonomous vehicle available to consumers by 2020. Rob Muir reports.